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BMI, BMR, body fat, water, calorie & protein calculator — all in one app
Health Calculator is a free, all-in-one health and fitness app with 7 essential calculators: BMI, BMR, body fat, water intake, calorie needs, ideal weight, and protein. Get fast, accurate results without juggling multiple apps — no sign-up required. 🔥 7 CALCULATORS IN ONE APP BMI Calculator Instantly calculate your Body Mass Index (BMI) using your height and weight. Get a clear classification — underweight, normal weight, overweight, or obese — based on WHO health standards. BMR Calculator Calculate your Basal Metabolic Rate (BMR) to know exactly how many calories your body burns at rest. Uses trusted formulas (Mifflin-St Jeor & Harris-Benedict) trusted by nutritionists and fitness coaches. Body Fat Calculator Estimate your body fat percentage for a more complete picture of your fitness than weight alone can give you. Water Intake Calculator Find your ideal daily water intake based on your weight, activity level, and climate — stay properly hydrated every day. Calorie Needs Calculator Combine your BMR with your activity level to estimate your Total Daily Energy Expenditure (TDEE) — the exact number of calories you need to maintain, lose, or gain weight. Ideal Weight Calculator Find your healthy weight range based on height, age, and gender — not just one number, but a realistic range to aim for. Protein Calculator Calculate your daily protein needs based on your weight, activity level, and fitness goals — whether you're building muscle, losing fat, or maintaining. Metric & Imperial Support Switch easily between kilograms/centimeters and pounds/feet-inches. Built for users across the US, UK, Europe, Asia, and worldwide. ⭐ WHY USERS LOVE HEALTH CALCULATOR ✔ All-in-One Toolkit — 7 calculators, one app, zero clutter ✔ All Core Features Free — Every calculator is free, no premium wall, no sign-up ✔ Optional Ad-Free Upgrade — Remove ads anytime with a simple one-time purchase ✔ Fast & Accurate — Results in seconds using medically recognized formulas ✔ Clean, Simple Design — No confusing graphs or unnecessary steps ✔ Privacy Focused — Your health data is never sold or shared ✔ Lightweight App — Small download size, low battery and storage usage ✔ Works Offline — Calculate your numbers without an internet connection 💪 PERFECT FOR • Anyone starting a weight loss or weight gain journey • Gym-goers tracking protein, calories, and body fat percentage • People following a diet plan or building a meal plan • Athletes monitoring hydration and daily water intake • Health-conscious users who want quick, complete body metrics • Students, nurses, trainers, and health professionals • Anyone who wants BMI, BMR, TDEE, and body fat without complicated apps 📊 UNDERSTAND YOUR NUMBERS Body Mass Index (BMI) is a simple screening tool that estimates whether your weight is healthy for your height. Basal Metabolic Rate (BMR) tells you how many calories your body needs just to function at rest — the foundation for any calorie counting or weight management plan. Body fat percentage gives a more accurate view of your composition than weight or BMI alone. Daily water intake and protein needs round out the picture, helping you build a complete, personalized health plan — all inside one simple, free app. 🚀 GET STARTED IN SECONDS 1. Enter your height, weight, age, and gender 2. Select your activity level and goals 3. Get instant BMI, BMR, body fat, water, calorie, and protein results 4. Track your progress toward a healthier you Download Health Calculator now and take the first step toward understanding your body better — free, fast, and private. Want an ad-free experience? A one-time in-app purchase removes all ads while every calculator stays exactly the same. Got a feature request or feedback? We're always improving — reach out anytime.